Extract vote registration query to a method

[paulsmithkc]

FirebaseMovieList2022/MovieList/app/src/main/java/edu/ranken/prsmith/movielist2022/ui/MovieListViewModel.java

Lines 61 to 88 in 703d922

	// observe the votes collection
	// FIXME: move to a separate method
	// FIXME: extract user-visible strings
	votesRegistration =
	db.collection("movieVote")
	.whereEqualTo("username", username)
	.addSnapshotListener((QuerySnapshot querySnapshot, FirebaseFirestoreException error) -> {
	if (error != null) {
	Log.e(LOG_TAG, "Error getting votes.", error);
	snackbarMessage.postValue("Error getting votes.");
	} else if (querySnapshot != null) {
	Log.i(LOG_TAG, "Votes update.");
	//List<MovieVoteValue> newVotes = querySnapshot.toObjects(MovieVoteValue.class);
	List<MovieVoteValue> newVotes = new ArrayList<>();
	for (QueryDocumentSnapshot document : querySnapshot) {
	String movieId = document.getString("movieId");
	Long value = document.getLong("value");
	if (movieId != null && value != null) {
	newVotes.add(new MovieVoteValue(movieId, value.intValue()));
	}
	}
	votes.postValue(newVotes);
	// snackbarMessage.postValue("Votes Updated.");
	}
	});